1. C. Guet et al., Nucl. Phys.A314 (1979) 1
2. K. Tsuji et al., Proc. Conf. Phys. Chem. of Fission, Rochester 1973, IAEA-SM-174/16
3. J.P. Theobald, TH Darmstadt preprint IKDA 85/22
4. J.E. Gindler et al., Proc. Conf. Phys. Chem. of Fission, J�lich 1979, IAEA-SM-241/F5
5. A.T. Kandil, Journ. Inorg. Nucl. Chem.38 (1976) 975